Biology Enzymes MDCAT 2017
PMDC Verified Question 73 of 79
What is true about enzymes?
A
Fibrous proteins
B
Non-specific
C
No effect on end product
D
Use in reaction
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: No effect on end product
Concept:

Enzymes function solely to lower activation energy and accelerate the rate at which equilibrium is reached. They do not alter the thermodynamics or the final nature of the reaction products.

Solution:

  • Enzymes are biocatalysts that speed up biochemical reactions.
  • Because they only alter the reaction pathway (lowering the activation energy), their presence does not affect the inherent chemical properties or the nature of the end product(s).


Why other options are incorrect:

Enzymes are globular (not fibrous), highly specific to their substrates (not non-specific), and remain entirely unchanged at the end of the reaction (they are not 'used up').

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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